Female Screw Molding via Split Mold Axial Ejection
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Solution Overview
Problem
Conventional applying material extruding containers face challenges in production efficiency due to complex mold designs and long molding times, particularly when molding female screws, which often require core pin rotation and removal.
Innovation Solution
The design incorporates a tubular member with a female screw on its inner surface and strategically placed openings that allow for the molding of female screws without rotating the core pin, enabling easier assembly and disassembly of molds, and facilitating the production process by allowing the core pin to be pulled out straight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the female screw is injection-molded using conventional core pin methods, then the female screw can be formed, but the core pin must be pulled out by rotation which increases molding time and complicates the mold design
Solution Approach 1:
The mold is divided into two separate halves (first mold half and second mold half) that can be independently positioned and removed. This segmentation allows each mold half to be extracted along the axial direction without requiring rotational movement, thereby reducing molding time and simplifying the ejection process.
Solution Approach 2:
The ejection direction is changed from rotational movement to linear axial movement. By designing the mold halves to separate along the axial direction rather than requiring rotational extraction, the invention eliminates the need for complex rotational ejection mechanisms and reduces molding time.
2Manufacturing precision
If the female screw is injection-molded using conventional core pin methods, then the female screw can be formed, but the mold design becomes complicated
Solution Approach 1:
The mold is divided into two separate halves (first mold half and second mold half) that can be independently positioned and removed. This segmentation allows each mold half to be extracted along the axial direction without requiring rotational movement, thereby reducing molding time and simplifying the ejection process.
Solution Approach 2:
Instead of using a single complex mold that requires rotational ejection, the invention uses two simpler mold halves that eject linearly. This inversion of the conventional single-mold approach simplifies the overall mold design while maintaining the ability to form complex female screw geometries.
3Loss of time
If a pair of core pins are used to injection mold the female screw, then the core pins do not need to be pulled out by rotation, but the tip shapes of the core pins become complicated
Solution Approach 1:
The core pins are completely removed from the molding system and replaced by a cavity-formed approach using two mold halves. The female screw geometry is formed by the negative space in the mold halves rather than by positive core pins, thereby simplifying the manufacturing of the molding tools.
Solution Approach 2:
Instead of using positive core pins to form the female screw, the invention uses negative cavities in the mold halves. This inversion transforms the problem from manufacturing complex core pins to manufacturing simpler mold cavities that can be easily fabricated and removed.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach simplifies the production of applying material extruding containers by reducing molding time and complexity, enabling easier release of core pins and facilitating the use of split molds for efficient production.
Implementation Method 1
the screwing action of the screw part being made to operate by relatively rotating the front section of the container and the rear section of the container to allow the movable body to move forward
Data Source
AI summary
The applying material extruding container includes a movable body and a screw part in the container including a container main body and a control tube, wherein by relatively rotating the container main body and the control tube, the screw part makes the movable body move forward, and the applying material extruding container includes a leading tube. The screw part includes a female screw as a ridge spirally extending on the inner circumferential surface of the leading tube. An opening is formed on the peripheral wall of the leading tube, and the female screw is arranged so as to be continued to the opening. One side constituting the sides of the opening extends along the trajectory drawn by the female screw in the side view facing the opening.